Acetylene lamp



W.'L FHISBIE. ACETYLENE LAMP.

APPLICATION FILED OCT- 28, 1920.

Patented 00% W, 19221.

Patented @ct. l d, lQZZ.

'1 ILLIAM J. nnrsnrn, on CHICAGO, ILnInors, nsslanon 'ro Jnsrnrrn. MANUFAG- rnnms' oomrnn'iz', onjcnioaeo, ILLINOIS, ACORPORATION or ILLINOIS.

AonTYLEnn LAMP.

Application filedDctobr 28, 1920. S,eria1 1\T-o.420,071.

dent. of Chicago, in the county of Cook,

State oflllinoiahave invented certain new and useful Improvements in Acetylene Lamps, of which the following is aspecifi cation.

My invention relates to acetylene lamps,

particularly to miners cap lamps which usually comprise awaterflcontainer, a carbide cup, and water flow controlling mechanism, together with a burner tip and a gas tube leading from the tip to the carbide cup to receive, the generated as. Suchlamps also usually have padot straining and clean ing material held in; position in front of the gas tube inlet so as to clean the gas and re move as much as possible the moisture there from before thegas flows to the tip. llhe main object of my invention is toprovlde improvedmea'ns for holdingwthe pad mate rial in properoperating position. AEgre'at many devices usually inthe form of plates or-shallow cups areemployed which have l rictional engagement withthe water tube structure or the water valve coiitrollmg structure to be slidon suclrstructure and frictionally held thereon to inturn securely hold the straining material in position in front of the gas tube inlet. More in detail,

my invention involves an improved pad holding member wh ch .Wlll more elhciently clamp its supporting structureand. hold 1tselfhlirmly in "place thereon, but which at the same time can be readily removed for the purpose oi applying a fresh pador'fol' shifting the old padto bring anew sect on thereof into position in front oh the: gas

tube inlet. 0n, the accompanyingdrawing, my unproved pad holder isclearlyshown. Onthe d1'awing l i 1 ;-,Fig. -1.is a side elevational} view ota mi ners cap lamp with the pad material, its holder member, and somexofthesurrounch Zing lamp ,partsyin vertical diainetralisection,

= Fig. 2 is an underside view of the Water container structure withtlie carbide cup removedrand showing the-pad holder in, place,

Fig. 3 is an enlarged"topviewoli the jpacl holder, 1 a j; Fig. 4 is 1 asectional View on plane ldlig. 8, i i a U 5 is a sectional view on planeS Q-S, F 1g. 3, and

. Fig. 6 is a sectional view similar to that pf Fig. '5 but showinga modified construcion.

The lamp shown is of the well known m ners cap type, comprising the water contamer C,,the carbide cup D, which has threaded engagement with the water container, the valve supporting tube E, the re flector F, andthe gas tube G, leading from the tlp H to the lower wall I of the Water container so as to communicatewith the gas space whenthe carbide cup is securedto the water container and the gas is being generated.- The water controlling mechanism shown is like that disclosed in Patent No. 1,303,658,. issued May 13th, 1919, to Augie L. Hansen, the "water tube-J extending through the supporting tube Ev -and being r0- tatable bymeansof the lever K, the lower end of the water tube forming a valve for engaging with thetop of the valve seatL formed at the lower end of the tube E, wa ter flowing through the opening Minto the water tube and the outflow of the water bemg controlled by the co-operation of the" valve end of thetube with the valve seat. N1 represents the filter, material usually in the form of a felt. pad or washer having an opening at itscenterwhereby it may he slipped up along the tube E into position in front of the inlet to the gas duct Gr. The. filter material holder oi? my invention clearly shown in Figs. 3 to 6. Its general v shape istha'i'yof a shallow cyclindrical cup,

the body 10 being circular and having the peripheral flange 11,,the central section of the body being deflected upwardly to form the shallow dome or crown 12. The crown part 12 has the radially extending tongues 13 ,and 14; which were [formed by cutting the-slots15 and;l6"parallelwith the diametral linefand then cutting the metal between the slots in a direction at right angles thereto, the opposed sections being then gradually bent at their ends to form linger 24, Which holes are formed in the slanting side wall 26 of the crown section 12. WVhen the rods are farthest apart, they abut against the outer edges of their respective holes and when thus'fully spaced apart the distance between them in the rectangular opening 19 is sufficiently less than the outer diameter of the supporting tube E that when the holder is slipped over the tube with the tube extending through the opening 19 between the rods,'the rods will be sprung apart and their spring action will exert frictional engagement on the tube to lock the holder in-adjusted position. The holder is slipped on with flange 11 extending upwardly as clearly shown in Fig. 1 so that the filter material N is received within the flange and is carried'into abutting engagement with the lower wall I of the water container so'as to'extend across the inlet of the gas. tube G. Gas generated in the carbide .cup D will find its way through the slots 15. and 16 and the holes 22, 23, 2st and 25 and through the space around the tube in the opening 19, and before the gas can reach theytube G, it must pass through the filter material and be cleaned.

The rods may be separate or as clearly shown on the drawing, apiece of spring wire may be bent intoU-shape so that the rod sections are'connected together by the yoke 27, the yoke being of a length preferably to keep the rod sections "spread apart normally in engagement witlrthe outer edges of their respective openings in the crown section 12.

' The yoke will also tend to'stiffen the rods and add to: their frictional engagement with the tube E when'the holder is applied thereto. The tongues 13 and 14: preferably extend a sufficient distance inwardly to hold the summits of the concave inner sides of the finger gripsli and 18 along sideof the rods but not quite touching them when the holder is removed from the tube E. When the holder is applied and the rods are spread apart, they will abut. against the grip ends of the tongues and the tongues will lend their springiness to resisting spread of the rods, so that the rods will then be quite firmly pressed against the tube Eand the frictional engagement greatly increased. By inserting the thumb and forefinger in the concave sides of the grip'sections 17 and 18 the'holder can be firmly held and can be thus readily slipped into place along the tube E or with:

drawn therefrom.

There the rods are cylindrical and of comparatively small diameter, their engagement with the cylindrical surface of larger diameter of the tube E will cause concentration of the clamping force along a very small area and this accounts for the strong grip that my improved holder takes on the supporting tube, the holder when pushed upwardly into place to position the filter material then firmly retaining its set position. Instead of having the rods of circular cross section, they could be of polygonal cross section as for example, triangular as shown in Fig. (5. The comparatively sharp inner edges of the rod would then securely anchor the rods on the tube E in adjusted position.

I thus produce a very simple and ellicient holder for the filter material of miners lamps. The cup structure of the holder can be stamped integral from sheet metal and the rod structures are also very readily formed. The flanging and crowning of the holder adds greatly to its strength. I do not desire to be limited to the exact construction shown and described as changes might readily be made which would still come within the scope of the irwention.

I claim as follows:

1. In a gas lamp, the combination with a gaschamber having a gas outlet, a support adjacent said outlet, and filtering material in front of said outlet, of a holder for said filtering material comprising a frame, resilient rods held on said frame and spaced apart, said rods receiving said supporting member between them and being spread apart thereby to exert clamping action on said supporting member and to thereby hold said frame in supporting position with reference to said filtering material.

2. In a gas lamp, the combination with a gas chamber having a gas outlet, filtering material in front of said outlet, and a supporting member adjacent said outlet, of a holder for the filtering material comprising a frame having an opening for receiving said supporting member, rods held at one end on said frame and extending across said opening at opposite sides of said supporting member, said rods being of resilient material and being spread apart by said supporting member to thereby exert clamping action thereon whereby to support said frame in holding position with reference to the filtering material.

3. In a gas burning lamp, the combination with a gas chamber having a gas outlet, filtering material in front of said outlet, and a supporting member near said outlet, of a holder for the filtering material comprising a frame having an opening therethrough for receiving said supporting member, rods held at their ends on said frame and extending across said opening toreceive said supporting member between them, said rods being of resilient material and being normally spaced to be spread apart by said supporting member when applied thereto to therel'n' clamp said supporting member and hold said frame in holding position relative to said filtering material.

4. In a gas burning lamp, the combination with a gas chamber having a gas outlet,

filtering material adjacent said outlet, and a i a frame having an opening for receiving said supporting member, rods held at their ends by said frame with their intermediate sections spaced apart and extending across said opening, said rods being normally spaced apart a distance less thanthe width of the supporting member and being of resilient material, said frame being applied to said supporting member with said rods at opposite sides thereof whereby said rods will be spread apart-and will exert clamping action on the supporting member to thereby hold said frame in holding position relatlve to said filtering material.

5. A supporting member for the filter pad of a miners acetylene lamp comprising a circular frame, said frame having holes near its periphery, rods extending at their ends through said holes, the material of said frame being cut away between said rods to provide a supporting member receiving opening, said rods being adapted tobe spread apart by a supporting member inserted through said opening, said rods being springy whereby to exert clamping action on the supporting member when spread apart thereby.

6. A holder for the filtering pad in a.

miners acetylene lamp comprising a circular metallic frame having its central section crowned, there bein holes through said frame at the base 0 the crowned section,

rods on the under side of said crown section extending at their ends through said holes to be thereby anchored on said frame, the frame material being cut away between said rods to provide an opening for receiving a supporting member, said rods when spread apart by a supporting member being adapted to exert clamping action thereon to hold the holder in place.

7. A holder for the filter pad in a miners acetylene lamp comprising a circular frame having an upstanding peripheral flange and having its centralseotion crowned upward 1y, holes through said frame at the base of:

said crowned section, rods at the under side of said crowned section extending at their ends through said holes to the opposite side of the crowned section, the material of said frame being cut away between said rods'to leave a central opening for the reception of a supporting member, said rods when spread ing through said frame for receiving said supporting member, resilient rods held at their ends on said frame and extending across said opening alongside the inner side of said tongues to receive said supporting member between them, said rods, being spread apart by said supporting member to thereby exert clamping action thereon to hold said frame in holding position relative to the filtering material, said tongues being positioned to be eventually engaged by said rods to assist said rods in clamping said supporting member, the tongue ends serving as finger grips for applying or removing said framefrom said supporting member.

9. The combination with a gas generator having a gas outlet, filtering material in front of said outlet, and a supporting member near said outlet, of a holder for said fil tering material comprising a circular plate, said plate having a central opening for re ceiving said supporting member, rods of reacross said opening, said'rods being held by said frame at their ends against spread- .silient material spaced apart and extending ing apart but being free to be spread apart a where they cross said opening, said rods recelvmg sald supporting member between them when said frame is appl ed to said member and being spread apart to thereby exert clamping action on said supporting member to hold sald frame In hold1ngpo- WILLI 1 J. FRISBIE.

100 sition relative to the filtering material, and i 

